RECEIVE CALLS FROM THIS NUMBER ON A REGULAR BASIS, BUT THEY NEVER LEAVE A NUMBER.

I received a call from this number, no message was left.  Came up on caller id as a Michigan call.  I don't answer calls from numbers I don't recognize.

CALLS MY CELL PHONE 2-3 TIMES A DAY, LEAVES NO MESSAGE AND WHEN I ANSWER THEY HANG UP OR THEIRS NO ONE THERE!! TIRED OF IT!!!  I LIVE NEAR DETROIT, MICHIGAN, ANYONE ELSE?